Package org.apache.wicket.markup.html.form.upload

Class MultiFileUploadField

java.lang.Object

org.apache.wicket.Component

org.apache.wicket.MarkupContainer

org.apache.wicket.markup.html.WebMarkupContainer

org.apache.wicket.markup.html.form.LabeledWebMarkupContainer

org.apache.wicket.markup.html.form.FormComponent<T>

org.apache.wicket.markup.html.form.FormComponentPanel<Collection<FileUpload>>

org.apache.wicket.markup.html.form.upload.MultiFileUploadField

All Implemented Interfaces:

Serializable, Iterable<Component>, IEventSink, IEventSource, IFeedbackContributor, IConverterLocator, IGenericComponent<Collection<FileUpload>,FormComponent<Collection<FileUpload>>>, IMetadataContext<Serializable,Component>, IQueueRegion, IFormModelUpdateListener, IFormVisitorParticipant, ILabelProvider<String>, IHeaderContributor, IRequestableComponent, IHierarchical<Component>, IClusterable

public class MultiFileUploadField
extends FormComponentPanel<Collection<FileUpload>>

Form component that allows the user to select multiple files to upload via a single <input type="file"/> field. Notice that this component clears its model at the end of the request, so the uploaded files MUST be processed within the request they were uploaded. Uses javascript implementation from http://the-stickman.com/web-development/javascript/upload-multiple-files-with-a-single-file-element/ For customizing caption text see RESOURCE_LIMITED and RESOURCE_UNLIMITED For an example of styling using CSS see the upload example in wicket-examples

Author:

Igor Vaynberg (ivaynberg)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final ResourceReference	JS
static final String	MAGIC_SEPARATOR
static final String	RESOURCE_LIMITED	Resource key used to retrieve caption message for when a limit on the number of uploads is specified.
static final String	RESOURCE_UNLIMITED	Resource key used to retrieve caption message for when no limit on the number of uploads is specified.
static final int	UNLIMITED	Represents an unlimited max count of uploads

Fields inherited from class org.apache.wicket.markup.html.form.FormComponent

FLAG_CONVERT_EMPTY_INPUT_STRING_TO_NULL, VALUE_SEPARATOR

Fields inherited from class org.apache.wicket.Component

ENABLE, FLAG_INITIALIZED, FLAG_RESERVED1, FLAG_RESERVED2, FLAG_RESERVED3, FLAG_RESERVED4, FLAG_RESERVED5, FLAG_RESERVED8, PARENT_PATH, PATH_SEPARATOR, RENDER, RFLAG_CONTAINER_DEQUEING, RFLAG_CONTAINER_HAS_REMOVALS

Constructor Summary

Constructors

Constructor	Description
MultiFileUploadField(String id)	Constructor
MultiFileUploadField(String id, int max)	Constructor
MultiFileUploadField(String id, IModel<? extends Collection<FileUpload>> model)	Constructor
MultiFileUploadField(String id, IModel<? extends Collection<FileUpload>> model, int max)	Constructor
MultiFileUploadField(String id, IModel<? extends Collection<FileUpload>> model, int max, boolean useMultipleAttr)	Constructor

Method Summary

Modifier and Type	Method	Description
protected Collection<FileUpload>	convertValue(String[] value)	Subclasses should overwrite this if the conversion is not done through the type field and the IConverter.
protected boolean	forceCloseStreamsOnDetach()	The FileUploadField will close any input streams you have opened in its FileUpload by default.
String[]	getInputAsArray()	Gets the request parameters for this component as strings.
boolean	isMultiPart()
protected void	onBeforeRender()	Called on all visible components before any component is rendered.
protected void	onComponentTag(ComponentTag tag)	Processes the component tag.
protected void	onDetach()	Sets the temporary converted input value to null.
void	renderHead(IHeaderResponse response)	Render to the web response whatever the component wants to contribute to the head section.
void	updateModel()	See FormComponent.updateCollectionModel(FormComponent) for details on how the model is updated.

Methods inherited from class org.apache.wicket.markup.html.form.FormComponentPanel

checkRequired, clearInput, newMarkupSourcingStrategy

Methods inherited from class org.apache.wicket.markup.html.form.FormComponent

add, add, convertInput, error, getConvertedInput, getDefaultLabel, getDefaultLabel, getForm, getInput, getInputName, getModelValue, getParameterValues, getRawInput, getType, getValidatorKeyPrefix, getValidators, getValue, hasRawInput, inputAsInt, inputAsInt, inputAsIntArray, inputChanged, internalOnModelChanged, invalid, isInputNullable, isRequired, isValid, newValidatable, newValidationError, onDisabled, onInvalid, onValid, processChildren, processInput, remove, reportRequiredError, setConvertedInput, setLabel, setModelValue, setRequired, setType, shouldTrimInput, trim, updateAutoLabels, updateAutoLabels, updateCollectionModel, valid, validate, validateRequired, validateValidators, visitComponentsPostOrder, visitFormComponentsPostOrder

Methods inherited from class org.apache.wicket.markup.html.form.LabeledWebMarkupContainer

getLabel

Methods inherited from class org.apache.wicket.markup.html.WebMarkupContainer

getWebApplication, getWebPage, getWebRequest, getWebResponse, getWebSession

Methods inherited from class org.apache.wicket.MarkupContainer

add, addDequeuedComponent, addOrReplace, autoAdd, canDequeueTag, contains, dequeue, dequeue, dequeuePreamble, findChildComponent, findComponentToDequeue, get, getAssociatedMarkup, getAssociatedMarkupStream, getMarkup, getMarkupType, getRegionMarkup, internalAdd, internalInitialize, iterator, iterator, newDequeueContext, onComponentTagBody, onInitialize, onRender, queue, remove, remove, removeAll, renderAll, renderAssociatedMarkup, renderNext, replace, setDefaultModel, size, stream, streamChildren, toString, toString, visitChildren, visitChildren

Methods inherited from class org.apache.wicket.Component

add, addStateChange, beforeRender, canCallListener, canCallListenerAfterExpiry, checkComponentTag, checkComponentTagAttribute, checkHierarchyChange, clearOriginalDestination, configure, continueToOriginalDestination, createConverter, debug, detach, detachModel, detachModels, determineVisibility, error, exceptionMessage, fatal, findMarkupStream, findPage, findParent, findParentWithAssociatedMarkup, getAjaxRegionMarkupId, getApplication, getBehaviorById, getBehaviorId, getBehaviors, getBehaviors, getClassRelativePath, getConverter, getDefaultModel, getDefaultModelObject, getDefaultModelObjectAsString, getDefaultModelObjectAsString, getEscapeModelStrings, getFeedbackMessages, getFlag, getId, getInnermostModel, getInnermostModel, getLocale, getLocalizer, getMarkup, getMarkupAttributes, getMarkupId, getMarkupId, getMarkupIdFromMarkup, getMarkupIdImpl, getMarkupSourcingStrategy, getMarkupTag, getMetaData, getModelComparator, getOutputMarkupId, getOutputMarkupPlaceholderTag, getPage, getPageRelativePath, getParent, getPath, getRenderBodyOnly, getRequest, getRequestCycle, getRequestFlag, getResponse, getSession, getSizeInBytes, getStatelessHint, getString, getString, getString, getStyle, getVariation, hasBeenRendered, hasErrorMessage, hasFeedbackMessage, info, initModel, internalRenderComponent, internalRenderHead, isActionAuthorized, isAuto, isBehaviorAccepted, isEnableAllowed, isEnabled, isEnabledInHierarchy, isIgnoreAttributeModifier, isInitialized, isRenderAllowed, isRendering, isStateless, isVersioned, isVisibilityAllowed, isVisible, isVisibleInHierarchy, markRendering, modelChanged, modelChanging, onAfterRender, onConfigure, onEvent, onModelChanged, onModelChanging, onReAdd, onRemove, redirectToInterceptPage, remove, remove, render, renderComponentTag, rendered, renderPart, renderPlaceholderTag, replaceComponentTagBody, replaceWith, sameInnermostModel, sameInnermostModel, send, setAuto, setDefaultModelObject, setEnabled, setEscapeModelStrings, setFlag, setIgnoreAttributeModifier, setMarkup, setMarkupId, setMarkupIdImpl, setMetaData, setOutputMarkupId, setOutputMarkupPlaceholderTag, setParent, setRenderBodyOnly, setResponsePage, setResponsePage, setResponsePage, setVersioned, setVisibilityAllowed, setVisible, success, urlFor, urlFor, urlFor, urlForListener, urlForListener, visitParents, visitParents, warn, wrap

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.wicket.IGenericComponent

getDefaultModel, getDefaultModelObject, getModel, getModelObject, setDefaultModel, setDefaultModelObject, setModel, setModelObject

Methods inherited from interface org.apache.wicket.IQueueRegion

dequeue, getRegionMarkup, newDequeueContext

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

UNLIMITED

public static final int UNLIMITED

Represents an unlimited max count of uploads

See Also:

• Constant Field Values

RESOURCE_LIMITED

public static final String RESOURCE_LIMITED

Resource key used to retrieve caption message for when a limit on the number of uploads is specified. The limit is represented via ${max} variable. Example: org.apache.wicket.mfu.caption.limited=Files (maximum ${max}):

See Also:

• Constant Field Values

RESOURCE_UNLIMITED

public static final String RESOURCE_UNLIMITED

Resource key used to retrieve caption message for when no limit on the number of uploads is specified. Example: org.apache.wicket.mfu.caption.unlimited=Files:

See Also:

• Constant Field Values

MAGIC_SEPARATOR

public static final String MAGIC_SEPARATOR

See Also:

• Constant Field Values

JS

public static final ResourceReference JS

Constructor Details

MultiFileUploadField

public MultiFileUploadField(String id)

Constructor

Parameters:

id -

MultiFileUploadField

public MultiFileUploadField(String id,
 int max)

Constructor

Parameters:

id -

max - max number of files a user can upload

MultiFileUploadField

public MultiFileUploadField(String id,
 IModel<? extends Collection<FileUpload>> model)

Constructor

Parameters:

id -

model -

MultiFileUploadField

public MultiFileUploadField(String id,
 IModel<? extends Collection<FileUpload>> model,
 int max)

Constructor

Parameters:

id -

model -

max - max number of files a user can upload

MultiFileUploadField

public MultiFileUploadField(String id,
 IModel<? extends Collection<FileUpload>> model,
 int max,
 boolean useMultipleAttr)

Constructor

Parameters:

id -

model -

max - max number of files a user can upload

useMultipleAttr - true in order to use the new HTML5 "multiple" <input> attribute. It will allow the users to select multiple files at once for multiple times if the browser supports it, otherwise it will work just as before - one file multiple times.

Method Details

onComponentTag

protected void onComponentTag(ComponentTag tag)

Description copied from class: FormComponent

Processes the component tag.

Overrides:

onComponentTag in class FormComponentPanel<Collection<FileUpload>>

Parameters:

tag - Tag to modify

See Also:

• FormComponentPanel.onComponentTag(org.apache.wicket.markup.ComponentTag)

onBeforeRender

protected void onBeforeRender()

Description copied from class: Component

Called on all visible components before any component is rendered.

NOTE: If you override this, you *must* call super.onBeforeRender() within your implementation. Because this method is responsible for cascading Component.onBeforeRender() call to its children it is strongly recommended that super call is made at the end of the override.

Changes to the component tree can be made only before calling super.onBeforeRender().

Overrides:

onBeforeRender in class FormComponent<Collection<FileUpload>>

See Also:

• Component.onBeforeRender()

isMultiPart

public boolean isMultiPart()

Overrides:

isMultiPart in class FormComponent<Collection<FileUpload>>

Returns:

True if this component encodes data in a multipart form submit

renderHead

public void renderHead(IHeaderResponse response)

Description copied from class: Component

Render to the web response whatever the component wants to contribute to the head section.

Specified by:

renderHead in interface IHeaderContributor

Overrides:

renderHead in class Component

Parameters:

response - Response object

getInputAsArray

public String[] getInputAsArray()

Description copied from class: FormComponent

Gets the request parameters for this component as strings.

Overrides:

getInputAsArray in class FormComponent<Collection<FileUpload>>

Returns:

The values in the request for this component

See Also:

• FormComponent.getInputAsArray()

convertValue

protected Collection<FileUpload> convertValue(String[] value)
                                       throws ConversionException

Description copied from class: FormComponent

Subclasses should overwrite this if the conversion is not done through the type field and the IConverter. WARNING: this method may be removed in future versions. If conversion fails then a ConversionException should be thrown

Overrides:

convertValue in class FormComponent<Collection<FileUpload>>

Parameters:

value - The value can be the getInput() or through a cookie

Returns:

The converted value. default returns just the given value

Throws:

ConversionException - If input can't be converted

updateModel

public void updateModel()

See FormComponent.updateCollectionModel(FormComponent) for details on how the model is updated.

Specified by:

updateModel in interface IFormModelUpdateListener

Overrides:

updateModel in class FormComponent<Collection<FileUpload>>

onDetach

protected void onDetach()

Description copied from class: FormComponent

Sets the temporary converted input value to null.

Overrides:

onDetach in class FormComponent<Collection<FileUpload>>

See Also:

• Component.onDetach()

forceCloseStreamsOnDetach

protected boolean forceCloseStreamsOnDetach()

The FileUploadField will close any input streams you have opened in its FileUpload by default. If you wish to manage the stream yourself (e.g. you want to use it in another thread) then you can override this method to prevent this behavior.

Returns:

true if stream should be closed at the end of request